The Prime Minister of Israel (Hebrew: רֹאשׁ הַמֶּמְשָׁלָה‎, Rosh HaMemshala, lit. Head of the Government, Hebrew acronym: רה״מ‎; Arabic: رئيس الحكومة‎‎, Rais al-Hukuma) is the head of the Israeli government and the most powerful figure in Israeli politics. Although the President of Israel is the country's head of state, his powers are largely ceremonial; the prime minister holds most of the real power. The official residence of the prime minister, Beit Rosh Hamemshala is in Jerusalem. The current prime minister is Benjamin Netanyahu of Likud, the ninth person to hold the position (excluding caretakers).

Following an election, the president nominates a member of the Knesset to become prime minister after asking party leaders whom they support for the position. The nominee then presents a government platform and must receive a vote of confidence in order to become prime minister. In practice, the prime minister is usually the leader of the largest party in the governing coalition.

Between 1996 and 2001, the prime minister was directly elected, separately from the Knesset.[2]

The office of prime minister came into existence on 14 May 1948, the date of the Declaration of the Establishment of the State of Israel, when the provisional government was created. David Ben-Gurion, leader of Mapai and head of the Jewish Agency became Israel's first prime minister. The position became permanent on 8 March 1949, when the first government was formed. Ben-Gurion retained his role until late 1953, when he resigned in order to settle in the Kibbutz of Sde Boker. He was replaced by Moshe Sharett. However, Ben-Gurion returned in a little under two years to reclaim his position. He resigned for a second time in 1963, breaking away from Mapai to form Rafi. Levi Eshkol took over as head of Mapai and prime minister. He became the first prime minister to head the country under the banner of two parties when Mapai formed the Alignment with Ahdut HaAvoda in 1965. In 1968 he also became the only party leader to command an absolute majority in the Knesset, after Mapam and Rafi merged into the Alignment, giving it 63 seats in the 120-seat Knesset.

On 26 February 1969, Eshkol became the first prime minister to die in office, and was temporarily replaced by Yigal Allon. However, Allon's stint lasted less than a month, as the party persuaded Golda Meir to return to political life and become prime minister in March 1969. Meir was Israel's first woman prime minister, and the third in the world (after Sirimavo Bandaranaike and Indira Gandhi).

After the 1984 elections had proved inconclusive with neither the Alignment nor Likud able to form a government, a national unity government was formed with a rotating prime ministership – Shimon Peres took the first two years, and was replaced by Shamir midway through the Knesset term.

Although the 1988 elections produced another national unity government, Shamir was able to take the role alone. Peres made an abortive bid to form a left-wing government in 1990, but failed, leaving Shamir in power until 1992.

Rabin became prime minister for the second time when he led Labour to victory in the 1992 elections. After his assassination on 4 November 1995, Peres took over as prime minister.

During the thirteenth Knesset (1992–1996) it was decided to hold a separate ballot for prime minister modeled after American presidential elections. This system was instituted in part because the Israeli electoral system makes it all but impossible for one party to win a majority. While only two parties—Mapai/Labour and Likud—had ever led governments, the large number of parties or factions in a typical Knesset usually prevents one party from winning the 61 seats needed for a majority.

In 1996, when the first such election took place, the outcome was a surprise win for Benjamin Netanyahu after election polls predicted that Peres was the winner.[3] However, in the Knesset election held at the same time, Labour won more votes than any other party (27%). Thus Netanyahu, despite his theoretical position of power, needed the support of the religious parties to form a viable government.

Ultimately Netanyahu failed to hold the government together, and early elections for both prime minister and the Knesset were called in 1999. Although five candidates announced their intention to run, the three representing minor parties (Benny Begin of Herut – The National Movement, Azmi Bishara of Balad and Yitzhak Mordechai of the Centre Party) dropped out before election day, and Ehud Barak beat Netanyahu in the election. However, the new system again appeared to have failed, as although Barak's One Israel party (an alliance of Labour, Gesher and Meimad) won more votes than any other party in the Knesset election, they garnered only 26 seats, the lowest ever by a winning party, meaning that a coalition with six smaller parties was once again necessary.

In early 2001, Barak resigned following the outbreak of the al-Aqsa Intifada. However, the government was not brought down, and only elections for prime minister were necessary. In the election itself, Ariel Sharon comfortably beat Barak, taking 62.4% of the vote. However, because Likud only had 21 seats in the Knesset, Sharon had to form a national unity government. Following Sharon's victory, it was decided to do away with separate elections for prime minister and return to the previous system.

The 2003 elections were carried out in the same manner as prior to 1996. Likud won 38 seats, the highest by a party for over a decade, and as party leader Sharon was duly appointed PM. However, towards the end of his term and largely as a result of the deep divisions within Likud over Israel's unilateral disengagement plan, Sharon broke away from his party to form Kadima, managing to maintain his position as prime minister and also becoming the first prime minister not to be a member of either Labour or Likud (or their predecessors). However, he suffered a stroke in January 2006, in the midst of election season, leading Ehud Olmert to become acting prime minister in the weeks leading to the elections. He was voted by the cabinet to be interim prime minister just after the 2006 elections, when Sharon had reached 100 days of incapacitation. He thus became Israel's third interim prime minister, only days before forming his own new government as the official Prime Minister of Israel.

In 2008, amid accusations of corruption and challenges from his own party, Olmert announced that he would resign. However his successor Tzipi Livni was unable to form a coalition government. In the election in the following year, while Kadima won the most seats, it was the Likud leader Benjamin Netanyahu who was given the task of forming a government. He was able to do so, thus beginning his second term as Prime Minister of Israel.

According to Israeli law, if a prime minister is temporarily incapacitated rather than dies (as was the case following Ariel Sharon's stroke in early 2006), power is transferred to the acting prime minister, until the prime minister recovers (Ehud Olmert took over from Sharon), for up to 100 days. If the prime minister is declared permanently incapacitated, or that period expires, the President of Israel oversees the process of assembling a new governing coalition, and in the meantime the acting prime minister or other incumbent minister is appointed by the cabinet to serve as interim prime minister.

In the case of Sharon, elections were already due to occur within 100 days of the beginning of his coma thus the post-election coalition building process pre-empted the emergency provisions for the selection of a new prime minister. Nevertheless, Olmert was appointed interim prime minister on 16 April 2006, after the elections, just days before he had formed a government on 4 May 2006, to become the official prime minister.

During his term of office, the prime minister lives in Jerusalem. Since 1974, the official residence of the prime minister is Beit Aghion, at the corner of Balfour and Smolenskin streets in Rehavia.[5]